*参照元 [#a5c012d7]
#backlinks

*説明 [#b929d2dd]
-パス: [[linux-4.4.1/arch/arm64/include/asm/memory.h]]

-FIXME: これは何?
--説明


**参考 [#s055d878]


*実装 [#y69f3422]
 /*
  * PAGE_OFFSET - the virtual address of the start of the kernel image (top
  *		 (VA_BITS - 1))
  * VA_BITS - the maximum number of bits for virtual addresses.
  * VA_START - the first kernel virtual address.
  * TASK_SIZE - the maximum size of a user space task.
  * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area.
  * The module space lives between the addresses given by TASK_SIZE
  * and PAGE_OFFSET - it must be within 128MB of the kernel text.
  */
 
 ...
 
 #define PAGE_OFFSET		(UL(0xffffffffffffffff) << (VA_BITS - 1))
-
--[[linux-4.4.1/VA_BITS]]


*コメント [#u5fd9ae3]

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